Advertisements
Advertisements
प्रश्न
How is the unit horsepower related to the S.I. unit of power?
Advertisements
उत्तर
1 house power (hp) = 746 watts
APPEARS IN
संबंधित प्रश्न
A body, when acted upon by a force of 10 kgf, gets displaced by 0.5 m. Calculate the work done by the force, when the displacement is (i) in the direction of force, (ii) at an angle of 60° with the force, and (iii) normal to the force. (g = 10 N kg-1)
A man spends 7.4 KJ energy in displacing a body by 74 m in the direction in which he applies force in 2.5 s. Calculate the force applied.
What is meant by a rotatory motion? Give one example.
What do you mean by a centrifugal force?
A boy takes 3 minutes to lift a 20 litre water bucket from a 20 m deep well, while his father does it in 2 minutes. Compare:
- the work, and
- power developed by them.
A boy takes 3 minutes to lift a 20 litre water bucket from a 20 m deep well, while his father does it in 2 minutes.
How much work each does? Take density of water = 103 kg m-3 and g = 9.8 N kg-1.
In the following case write yes, if the work is being done and no if no work is being done.
A man trying to push a wall.
A force F when acts on a body, displace it by a distance d in a direction at an angle θ with the direction of the force. Write down the expression for the work done by the force.
Justify the statement. “Power can be expressed as the product of force and velocity.”
For the following scenario, state whether the work done by gravity is positive, negative, or zero.
A person climbs a ladder.
